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Re: [sumo-dev] Adding a Traci simulation command to get the closest junction in a current route relatively to another junction
In the very lates development version (windows version updated tomorrow) you can also retrieve the route length from the stage result:
length = stage.length

Am Do., 10. Jan. 2019 um 14:15 Uhr schrieb Jakob Erdmann <namdre.sumo@xxxxxxxxx>:
In sumo, vehicle routes are organized around roads (or rather edges) rather than junctions.
If you can rephrase your problem in terms of edges the the solution becomes quite simple.

edges = traci.vehicle.getRoute(vehID)
remainingEdges = edges[traci.vehicle.getRouteIndex(vehID):]

then for each of the remaining edges you can compute the traveltime to your destination (edge) Z

stage = traci.simulation.findRoute(fromEdge, toEdge)
travelTime = stage.travelTime

If you need to do the same thing with junctions, then you can use sumolib (http://sumo.dlr.de/wiki/Tools/Sumolib) to read the network graph of edges and junctions. This allows you to identify the target junction for each of the remaining edges (edge.getToNode()). You then just need to pick a suitable target edge from all edges that are incoming to your target junction Z (node.getIncoming()).

regards,
Jakob

Am Do., 10. Jan. 2019 um 10:39 Uhr schrieb Arslane Hamza Cherif <arslane.hamzacherif@xxxxxxxxx>:
Hello Dear sumo-dev,

First of all, excuse me if I am missing something or doing it wrong, it is the first time that I contribute to an open-source project, but of course not the first time that I use SUMO,

In fact, I had worked during the six last years with SUMO and Veins, and I really appreciate these tools, 2 years ago I was looking for a solution to my problem, and I realised that It was impossible with an old version of SUMO, so I switched to a solution based on Python, SumoLib and Networkx API.

Now lets me explain the problem, and how I think that is possible to solve it (I will appreciate any help in this sense, to guide me for my first contribution)

Problem: Say for instance that you have a VehX that follows a specific route that is passing by multiple junctions (e.g: Junctions: A, B, C, D), what I want is to identify the closest one relative to another junction Z that is not in the current route of the vehicle. I asked the question two years ago here: https://sourceforge.net/p/sumo/mailman/message/35079189/ 

However, at that time I was using an old version of SUMO that does not include the command (0x83) (http://sumo.dlr.de/wiki/TraCI/Simulation_Value_Retrieval)

Maybe it is possible to implement a new command that will achieve this by:
  1. Identifying the junctions in a current route of VehX
  2. Computing the driving distance (or air distance if needed) between junctions (A,Z), (B,Z), (C,Z) & (D,Z)
  3. Returning the junction with the shortest distance among the 4 junctions
So, any advice on how I can do it ? from where can I start?

Thank you very much for your time,

Best Regards,
Arslane HAMZA-CHERIF

Le mer. 9 janv. 2019 à 10:55, Arslane Hamza Cherif <hc.arslan90@xxxxxxxxx> a écrit :
Hello Dear sumo-dev,

First of all, excuse me if I am missing something or doing it wrong, it is the first time that I contribute to an open-source project, but of course not the first time that I use SUMO,

In fact, I had worked during the six last years with SUMO and Veins, and I really appreciate these tools, 2 years ago I was looking for a solution to my problem, and I realised that It was impossible with an old version of SUMO, so I switched to a solution based on Python, SumoLib and Networkx API.

Now lets me explain the problem, and how I think that is possible to solve it (I will appreciate any help in this sense, to guide me for my first contribution)

Problem: Say for instance that you have a VehX that follows a specific route that is passing by multiple junctions (e.g: Junctions: A, B, C, D), what I want is to identify the closest one relative to another junction Z that is not in the current route of the vehicle. I asked the question two years ago here: https://sourceforge.net/p/sumo/mailman/message/35079189/ 

However, at that time I was using an old version of SUMO that does not include the command (0x83) (http://sumo.dlr.de/wiki/TraCI/Simulation_Value_Retrieval)

Maybe it is possible to implement a new command that will achieve this by:
  1. Identifying the junctions in a current route of VehX
  2. Computing the driving distance (or air distance if needed) between junctions (A,Z), (B,Z), (C,Z) & (D,Z)
  3. Returning the junction with the shortest distance among the 4 junctions
So, any advice on how I can do it ? from where can I start?

Thank you very much for your time,

Best Regards,
Arslane HAMZA-CHERIF
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